<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - postprocessing backgrounds</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				margin: 0px;
				background-color: #000;
				overflow: hidden;
				font-family:Monospace;
				font-size:13px;
				margin: 0px;
				text-align:center;
				overflow: hidden;
			}

			a { color: #88f; }

			#info {
				color: #fff;
				position: absolute;
				top: 10px;
				width: 100%;
				text-align: center;
				display:block;
			}
		</style>
	</head>
	<body>
		<div id="info">
			<a href="http://threejs.org" target="_blank">three.js</a> - Backgrounds: ClearPass, TexturePass and CubeTexturePass by <a href="https://clara.io" target="_blank">Ben Houston</a>
		</div>

		<div id="container"></div>

		<script src="../build/three.js"></script>
		<script src="js/libs/stats.min.js"></script>
		<script src="js/libs/dat.gui.min.js"></script>

		<script src="js/shaders/CopyShader.js"></script>

		<script src="js/postprocessing/EffectComposer.js"></script>
		<script src="js/postprocessing/ClearPass.js"></script>
		<script src="js/postprocessing/RenderPass.js"></script>
		<script src="js/postprocessing/TexturePass.js"></script>
		<script src="js/postprocessing/CubeTexturePass.js"></script>
		<script src="js/postprocessing/ShaderPass.js"></script>

		<script src="js/controls/OrbitControls.js"></script>

		<script>

			var scene, renderer, composer;
			var clearPass, texturePass, renderPass;
			var cameraP, cubeTexturePassP;
			//var cameraO, cubeTexturePassO;
			var gui, stats, texture;

			var params = {

				clearPass: true,
				clearColor: 'white',
				clearAlpha: 1.0,

				texturePass: true,
				texturePassOpacity: 1.0,

				cubeTexturePass: true,
				cubeTexturePassOpacity: 1.0,

				renderPass: true

				//autoRotate: true,

				//camera: 'perspective'

			};

			init();
			animate();

			clearGui();

			function clearGui() {

				if ( gui ) gui.destroy();

				gui = new dat.GUI();

				gui.add( params, "clearPass" );
				gui.add( params, "clearColor", [ 'black', 'white', 'blue', 'green', 'red' ] );
				gui.add( params, "clearAlpha", 0, 1 );

				gui.add( params, "texturePass" );
				gui.add( params, "texturePassOpacity", 0, 1 );

				gui.add( params, "cubeTexturePass" );
				gui.add( params, "cubeTexturePassOpacity", 0, 1 );

				gui.add( params, "renderPass" );

				//gui.add( params, "autoRotate" );

				//gui.add( params, 'camera', [ 'perspective', 'orthographic' ] );

				gui.open();

			}

			function init() {

				container = document.getElementById( "container" );

				var width = window.innerWidth || 1;
				var height = window.innerHeight || 1;
				var aspect = width / height;
				var devicePixelRatio = window.devicePixelRatio || 1;

				renderer = new THREE.WebGLRenderer( { antialias: false } );
				renderer.setPixelRatio( devicePixelRatio );
				renderer.setSize( width, height );
				document.body.appendChild( renderer.domElement );

				stats = new Stats();
				container.appendChild( stats.dom );

				//

				cameraP = new THREE.PerspectiveCamera( 65, aspect, 1, 10 );
				cameraP.position.z = 7;

			//	cameraO = new THREE.OrthographicCamera( width / - 2, width / 2, height / 2, height / - 2, 3, 10 );
			//	cameraO.position.z = 7;

			//	var fov = THREE.Math.degToRad( cameraP.fov );
			//	var hyperfocus = ( cameraP.near + cameraP.far ) / 2;
			//	var _height = 2 * Math.tan( fov / 2 ) * hyperfocus;
			//	cameraO.zoom = height / _height;

				scene = new THREE.Scene();

				group = new THREE.Object3D();
				scene.add( group );

				var light = new THREE.PointLight( 0xddffdd, 1.0 );
				light.position.z = 70;
				light.position.y = -70;
				light.position.x = -70;
				scene.add( light );

				var light2 = new THREE.PointLight( 0xffdddd, 1.0 );
				light2.position.z = 70;
				light2.position.x = -70;
				light2.position.y = 70;
				scene.add( light2 );

				var light3 = new THREE.PointLight( 0xddddff, 1.0 );
				light3.position.z = 70;
				light3.position.x = 70;
				light3.position.y = -70;
				scene.add( light3 );

				var geometry = new THREE.SphereBufferGeometry( 1, 48, 24 );

				var material = new THREE.MeshStandardMaterial();
				material.roughness = 0.5 * Math.random() + 0.25;
				material.metalness = 0;
				material.color.setHSL( Math.random(), 1.0, 0.3 );

				var mesh = new THREE.Mesh( geometry, material );
				group.add( mesh );

				// postprocessing

				var genCubeUrls = function( prefix, postfix ) {
					return [
						prefix + 'px' + postfix, prefix + 'nx' + postfix,
						prefix + 'py' + postfix, prefix + 'ny' + postfix,
						prefix + 'pz' + postfix, prefix + 'nz' + postfix
					];
				};

				composer = new THREE.EffectComposer( renderer );

				clearPass = new THREE.ClearPass( params.clearColor, params.clearAlpha );
				composer.addPass( clearPass );

				texturePass = new THREE.TexturePass();
				composer.addPass( texturePass );

				var textureLoader = new THREE.TextureLoader();
				textureLoader.load( "textures/hardwood2_diffuse.jpg", function( map ) {
					texturePass.map = map;
				});

				cubeTexturePassP = new THREE.CubeTexturePass( cameraP );
				composer.addPass( cubeTexturePassP );

				var ldrUrls = genCubeUrls( "textures/cube/pisa/", ".png" );
				new THREE.CubeTextureLoader().load( ldrUrls, function ( ldrCubeMap ) {
					cubeTexturePassP.envMap = ldrCubeMap;
					console.log( "loaded envmap");
				});

				renderPass = new THREE.RenderPass( scene, cameraP );
				renderPass.clear = false;
				composer.addPass( renderPass );

				copyPass = new THREE.ShaderPass( THREE.CopyShader );
				copyPass.renderToScreen = true;
				composer.addPass( copyPass );

				var controls = new THREE.OrbitControls( cameraP, renderer.domElement );
				controls.target.set( 0, 0, 0 );
				controls.update();

				window.addEventListener( 'resize', onWindowResize, false );

			}

			function onWindowResize() {

				var width = window.innerWidth;
				var height = window.innerHeight;
				var aspect = width / height;

				cameraP.aspect = aspect;
				cameraP.updateProjectionMatrix();

				/*cameraO.left = - height * aspect;
				cameraO.right = height * aspect;
				cameraO.top = height;
				cameraO.bottom = - height;
				cameraO.updateProjectionMatrix();*/

				renderer.setSize( width, height );

				var pixelRatio = renderer.getPixelRatio();
				var newWidth  = Math.floor( width / pixelRatio ) || 1;
				var newHeight = Math.floor( height / pixelRatio ) || 1;
				composer.setSize( newWidth, newHeight );

			}

			function animate() {

				requestAnimationFrame( animate );

				stats.begin();

				cameraP.updateMatrixWorld( true );

				var newColor = clearPass.clearColor;
				switch( params.clearColor ) {
					case 'blue': newColor = 0x0000ff; break;
					case 'red': newColor = 0xff0000; break;
					case 'green': newColor = 0x00ff00; break;
					case 'white': newColor = 0xffffff; break;
					case 'black': newColor = 0x000000; break;
				}

				clearPass.enabled = params.clearPass;
				clearPass.clearColor = newColor;
				clearPass.clearAlpha = params.clearAlpha;

				texturePass.enabled = params.texturePass;
				texturePass.opacity = params.texturePassOpacity;

				cubeTexturePassP.enabled = params.cubeTexturePass;
				cubeTexturePassP.opacity = params.cubeTexturePassOpacity;

				renderPass.enabled = params.renderPass;

				composer.render();

				stats.end();

			}

		</script>
	</body>
</html>
